326387381 has 2 divisors, whose sum is σ = 326387382. Its totient is φ = 326387380.

The previous prime is 326387359. The next prime is 326387387. The reversal of 326387381 is 183783623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 286760356 + 39627025 = 16934^2 + 6295^2 .

It is a cyclic number.

It is not a de Polignac number, because 326387381 - 2¹⁴ = 326370997 is a prime.

It is a super-2 number, since 2×326387381² = 213057444952078322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326387387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163193690 + 163193691.

It is an arithmetic number, because the mean of its divisors is an integer number (163193691).

Almost surely, 2^326387381 is an apocalyptic number.

It is an amenable number.

326387381 is a deficient number, since it is larger than the sum of its proper divisors (1).

326387381 is an equidigital number, since it uses as much as digits as its factorization.

326387381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 326387381 is about 18066.1944249474. The cubic root of 326387381 is about 688.5113751809.

The spelling of 326387381 in words is "three hundred twenty-six million, three hundred eighty-seven thousand, three hundred eighty-one".